https://valetinowiki.racing/wi....ki/The_3_Biggest_Dis
Alex the African Grey Parrot Irene Pepperberg, an animal psychologist, bought Alex in 1977 from a pet shop located on the Northwest Side. She began an investigation lasting 30 years that would change our understanding of avian intelligence. Her work with him has challenged the belief that birds could only mimic human speech without any understanding of meaning. What is Alex? Alex (short form for Avian Learning experiment) was initially an African grey
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